e a b l e s a



N. PETERS. PHOT0LITHOGRAFHER WASHINGTON D C @uiten gister latent ffies.

en' A n'Lns t. WILso Ni, or GINGINN ATI, onto.

Lefhrrs Patent .No.l'l, dated l eptfunber I7, 1867. i i

IMPROVEMENT IN STEAM-PRESSURE GAUGES.

'.lO WIIOM Il MY CONCERN:

Be it known that I, CHARLES A. WILSON, of Cincinnati, in theeounty oil Hamilton, and State of Ohio, havo invented a new and useful Improvement in Steam-Pressure Gauges.

My invention relates to a stop and blow-oii` cock and water-trap combined having two passages, which comi niunieate respectively with the boiler and with the diaphragm-chamber of a'stcaln-prcssurc gauge, and un inter mediate passage, together with a plug of peculiar construction, which serves, according to its position, either to confine water in snid passages so as to permit the transmission of the steam pressure Without its direct Contact, or to discharge the water externally'so as to prevent freezing when the steam is shut off from the gauge.

Figure l is a vertical section of my device inthe act of discharging.

Figure 2 shows the same in condition for use;

Figure 3 is an axial section of the plug.

A is a casting having three vertical tubes, B C D, of which B and communicate at their upper and C and i D at their lower portions through a single horizontal duct, E. F and G are screwmecked passages, by which i the apparatus is connected to the steam pipe and pressure-gauge respectively. H is an external ventage in linc with ,the horizontal duct E. I is the plug and J the socket of a. four-way cock, said plug having an orifice, K, which traverses it diametrically, and another orifice, L, which entering the plug in the `same latitude as the oriiice K passes out along the axis and discharges at the end of the plug I. When it Vis desired to turn the steam on the plug is placed in thc position indicated at fig. 2, so as to open al clear passage from 'the steam pipe to the tube B. In this position the tubes C and D soon become charged with the water of condensation, and while permitting the action of the steam pressure prevent its direct contactwith the diaphragm, thus acting as an effectual water-trap. The closing of the cock is effected by simply turning it a quarter around, as shown in iig. 1, and this action opens the entire trap by allowing the tubes C and D to discharge their contents into the duet E and thence out through the orifice K at the end of the plug.

I claim herein as new and of my inventioni p The arrangement of the three vertical tubes B C D, horizontal ductE, and four-way cock I, with passages F and G and ventage H, substantially as und for the purpose described.

In testimony of which invention I hereunto set my hand.

C. A. WILSON.

Witnesses:

GEO. II. KNIGHT, JAMns I-I. LAYMAN. 

